Method of controlling engine stop-start operation for heavy-duty hybrid-electric and hybrid-hydraulic vehicles
First Claim
1. A method of implementing an engine stop-start or idle-stop algorithm for a heavy-duty hybrid-electric vehicle of at least 10,000 pounds Gross Vehicle Weight Rating (GVWR) whereby a crankshaft of the internal combustion engine continues to rotate and the fuel supply is cut off when the vehicle does not need traction power from the internal combustion engine and the fuel supply is automatically turned on to restart the engine when the vehicle needs power from the internal combustion engine, comprising:
- determining when a State Of Charge (SOC) of an energy storage is above a minimum operating threshold;
determining when a State Of Charge (SOC) of the energy storage is below a minimum recharge threshold;
determining when at least one of a vehicle propulsion requirement and an accessories power requirement is below a minimum turnoff threshold;
determining when at least one of the vehicle propulsion and accessories power requirement is above a minimum startup threshold;
turning off the fuel supply and turning on the fuel supply to restart the vehicle internal combustion engine;
rotating the crankshaft of the internal combustion engine when the engine fuel supply is turned off by a generator that is mechanically coupled to the engine to act as a motor to spin the engine.
11 Assignments
0 Petitions
Accused Products
Abstract
A start-stop or idle-stop method for a heavy-duty hybrid vehicle that turns off the fuel supply while maintaining the crankshaft rotation of the internal combustion engine when the vehicle stops or, optionally, when the vehicle travels downhill, travels in a noise sensitive location, travels in an exhaust emissions sensitive location, or operates in an emergency situation. The stop-start or idle-stop method automatically turns on the engine fuel supply to restart combustion when the vehicle starts accelerating, is no longer traveling downhill, is no longer traveling in a noise sensitive or exhaust sensitive location, is no longer in an emergency situation, or has dropped below the minimum energy storage restart level.
169 Citations
52 Claims
-
1. A method of implementing an engine stop-start or idle-stop algorithm for a heavy-duty hybrid-electric vehicle of at least 10,000 pounds Gross Vehicle Weight Rating (GVWR) whereby a crankshaft of the internal combustion engine continues to rotate and the fuel supply is cut off when the vehicle does not need traction power from the internal combustion engine and the fuel supply is automatically turned on to restart the engine when the vehicle needs power from the internal combustion engine, comprising:
-
determining when a State Of Charge (SOC) of an energy storage is above a minimum operating threshold;
determining when a State Of Charge (SOC) of the energy storage is below a minimum recharge threshold;
determining when at least one of a vehicle propulsion requirement and an accessories power requirement is below a minimum turnoff threshold;
determining when at least one of the vehicle propulsion and accessories power requirement is above a minimum startup threshold;
turning off the fuel supply and turning on the fuel supply to restart the vehicle internal combustion engine;
rotating the crankshaft of the internal combustion engine when the engine fuel supply is turned off by a generator that is mechanically coupled to the engine to act as a motor to spin the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method of implementing an engine stop-start or idle-stop algorithm for a heavy-duty hybrid-hydraulic vehicle of at least 10,000 pounds Gross Vehicle Weight Rating (GVWR) whereby the crankshaft of the internal combustion engine continues to rotate and the fuel supply is cut off when the vehicle does not need traction power from the internal combustion engine and the fuel supply is automatically turned on to restart the engine when the vehicle needs power from the internal combustion engine, comprising:
-
determining when a State Of Charge (SOC) of an energy storage is above a minimum operating threshold;
determining when a State Of Charge (SOC) of the energy storage is below a minimum recharge threshold;
determining when at least one of a vehicle propulsion power requirement and an accessories power requirement is below a minimum turnoff threshold;
determining when at least one of the vehicle propulsion and accessories power requirement is above a minimum startup threshold;
turning off the fuel supply and turning on the fuel supply to restart the vehicle internal combustion engine;
rotating the crankshaft of the internal combustion engine when the engine fuel supply is cut off via a hydraulic pump that is mechanically coupled to the engine to act as a motor to spin the engine. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
-
Specification